. >>> general david petraeus hands over command of afghanistan. the outgoing top commander of nato forces transferred authority to marine lieutenant john allen. petraeus plans to retire from the army before taking over as cia director on september the 6th. >>> former south african president nelson mandela celebrating his 93rd birthday with his family by his side as birthday wishes pour in from around the world. here are a few of them. >> happy birthday. >> happy birthday. ♪ happy birthday to you ♪ happy birthday >> the united nations and nelson mandela have one request, asking each person to devote 67 minutes to helping others, one minute for every year of mandela's own service to humanity. 67 minutes. that's a challenge we can all rise to. >>> this typhoon is headed for japan. that's got workers scrambling to protect a reactor at yeah been's crippled nuclear plant. even though the typhoon is expected to strike well south of the plant, authorities say they are not taking chances. typhoon ma-on is expected to make landfall tuesday. >>> even by